Australian scientists find that overlapping crystalline silicon solar cells make other materials
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Green speaks
Form other materials on silicon
At the recent "EU PVSEC" conference hosted by the International Society for Solar Cells, Professor Martin Green from the University of New South Wales (UNSW) in Australia presented groundbreaking research on the potential of crystalline silicon solar cells. Known for his pioneering work in photovoltaics, Green previously set a world record with a 25% conversion efficiency for silicon-based cells.
In his talk titled “Silicon Wafer-Based Tandem Cells: The Ultimate Photovoltaic Solution,†Green introduced a promising approach: stacking other materials on top of silicon to create tandem structures. He explained that while traditional silicon cells are limited to about 29% efficiency, combining them with other materials could push this number as high as 42.5%, and potentially even 47.5% with further optimization.
When it comes to the materials being considered, Green highlighted several options. These include III-V semiconductors like GaAs, which are already used in space applications and concentrated solar systems. He also mentioned CZTS, a promising thin-film material that doesn’t require indium, and perovskite materials, which have shown great potential in dye-sensitized solar cells. While specific details of the research remain undisclosed, Green emphasized that each material brings unique advantages and challenges in terms of performance and cost.
During the event, a solar cell industry engineer shared their perspective, saying, “As we look beyond the current limits of silicon, we’re actively exploring these new technologies.†This marks a significant step forward in the quest for more efficient and sustainable solar energy solutions. (Reporter: He Jiji, “Nikkei Electronicsâ€)
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